{"id":188099,"date":"2025-02-06T10:34:03","date_gmt":"2025-02-06T10:34:03","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=188099"},"modified":"2025-02-06T10:34:04","modified_gmt":"2025-02-06T10:34:04","slug":"flame-test","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/02\/06\/flame-test\/","title":{"rendered":"Flame Test"},"content":{"rendered":"\n<p>Flame Test Metal Barium chloride Calcium chloride Copper (II) sulfate Potassium chloride Sodium chloride 2. Test for Cu+2, Fe+\u00c2\u00b3, Pb+2, Zn +2 Solution Cu2 in Copper (II) sulfate Fe3 in Iron (III) chloride Zn2 in Zinc sulfate Fe2 in Iron (II) sulfate Pb+2 in Lead nitrate Reaction with Sodium Hydroxide Color Flame Reaction with Ammonia<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/02\/image-76-1024x483.png\" alt=\"\" class=\"wp-image-188100\"\/><\/figure>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The Correct Answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n<p>The flame test and reactions with sodium hydroxide (NaOH) and ammonia (NH\u2083) are fundamental methods for identifying metal ions in solution.Below is a detailed explanation of these tests for the specified metal salts and ions:<\/p>\n\n\n\n<p><strong>1. Flame Test:<\/strong><\/p>\n\n\n\n<p>hen metal salts are introduced into a flame, the heat excites electrons in the metal ions, causing them to emit light at characteristic wavelengths.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Barium chloride (BaCl\u2082):<\/strong> roduces a light apple green flame.\ue200cite\ue202turn0search20\ue201<\/li>\n\n\n\n<li><strong>Calcium chloride (CaCl\u2082):<\/strong> ields a brick-red flame.\ue200cite\ue202turn0search20\ue201<\/li>\n\n\n\n<li><strong>Copper(II) sulfate (CuSO\u2084):<\/strong> ives a blue-green flame.\ue200cite\ue202turn0search20\ue201<\/li>\n\n\n\n<li><strong>Potassium chloride (KCl):<\/strong> enerates a lilac (light purple) flame.\ue200cite\ue202turn0search20\ue201<\/li>\n\n\n\n<li><strong>Sodium chloride (NaCl):<\/strong> roduces a bright yellow flame.\ue200cite\ue202turn0search20\ue201<br><strong>2. Reactions with Sodium Hydroxide and Ammonia:<\/strong><\/li>\n<\/ul>\n\n\n\n<p>dding NaOH or NH\u2083 to solutions containing metal ions can lead to the formation of precipitates or complex ions, aiding in their identification.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cu\u00b2\u207a (from Copper(II) sulfate):<\/strong> &#8211; <em>With NaOH:<\/em> orms a light blue precipitate of copper(II) hydroxide (Cu(OH)\u2082). &#8211; <em>With NH\u2083:<\/em> nitially forms a light blue precipitate of Cu(OH)\u2082, which dissolves in excess NH\u2083 to form a deep blue solution of the tetraamminecopper(II) complex, [Cu(NH\u2083)\u2084]\u00b2\u207a.\ue200cite\ue202turn0search3\ue201<\/li>\n\n\n\n<li><strong>Fe\u00b3\u207a (from Iron(III) chloride):<\/strong> &#8211; <em>With NaOH:<\/em> roduces a reddish-brown precipitate of iron(III) hydroxide (Fe(OH)\u2083). &#8211; <em>With NH\u2083:<\/em> orms a similar reddish-brown precipitate of Fe(OH)\u2083.\ue200cite\ue202turn0search5\ue201<\/li>\n\n\n\n<li><strong>Zn\u00b2\u207a (from Zinc sulfate):<\/strong> &#8211; <em>With NaOH:<\/em> orms a white precipitate of zinc hydroxide (Zn(OH)\u2082), which dissolves in excess NaOH to form a colorless solution of the zincate ion, [Zn(OH)\u2084]\u00b2\u207b. &#8211; <em>With NH\u2083:<\/em> orms a white precipitate of Zn(OH)\u2082, which dissolves in excess NH\u2083 to form a colorless solution of the tetraamminezinc(II) complex, [Zn(NH\u2083)\u2084]\u00b2\u207a.\ue200cite\ue202turn0search26\ue201<\/li>\n\n\n\n<li><strong>Fe\u00b2\u207a (from Iron(II) sulfate):<\/strong> &#8211; <em>With NaOH:<\/em> orms a dirty green precipitate of iron(II) hydroxide (Fe(OH)\u2082), which may oxidize to Fe(OH)\u2083 upon standing. &#8211; <em>With NH\u2083:<\/em> orms a similar dirty green precipitate of Fe(OH)\u2082.\ue200cite\ue202turn0search7\ue201<\/li>\n\n\n\n<li><strong>Pb\u00b2\u207a (from Lead nitrate):<\/strong> &#8211; <em>With NaOH:<\/em> orms a white precipitate of lead(II) hydroxide (Pb(OH)\u2082), which dissolves in excess NaOH to form a colorless solution of the plumbate ion, [Pb(OH)\u2084]\u00b2\u207b. &#8211; <em>With NH\u2083:<\/em> orms a white precipitate of Pb(OH)\u2082, which dissolves in excess NH\u2083 to form a colorless solution of the tetraamminelead(II) complex, [Pb(NH\u2083)\u2084]\u00b2\u207a.\ue200cite\ue202turn0search5\ue201<br>hese reactions are essential for qualitative inorganic analysis, allowing chemists to identify metal ions based on their characteristic flame colors and precipitation behaviors with hydroxide ions.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Flame Test Metal Barium chloride Calcium chloride Copper (II) sulfate Potassium chloride Sodium chloride 2. Test for Cu+2, Fe+\u00c2\u00b3, Pb+2, Zn +2 Solution Cu2 in Copper (II) sulfate Fe3 in Iron (III) chloride Zn2 in Zinc sulfate Fe2 in Iron (II) sulfate Pb+2 in Lead nitrate Reaction with Sodium Hydroxide Color Flame Reaction with Ammonia [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-188099","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/188099","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=188099"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/188099\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=188099"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=188099"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=188099"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}